Type-writing machine.



INVENTUR Patented Sept. 26, 1911.

+16 ATTORNEY W. J. BARRON. TYPE WRITING MACHINE. APPLICATION FILED m0.1'1. 1910.

. urged leftwuamcll hy ltlhe (urinal.

UNITED STATES PATENT OFFICE.

WALTER J. BARRON, OF NEW YORK, N. Y., ASSIGNOR TO REMINGTON TYPEWRITEBCOMPANY, OF ILION, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

i atented Sept. 26, 1 91 1 To all whom it may concern:

Be it known that I, Vanna: J? BARRON, citizen of the United States, andresident of the borough of Brooklyn, city of New York, in the county ofKings and State of New York, have invented certain new and usefulImprovements in T vpell'riting Machines. of which the following is aspecification.

My invention relates to carriage feeding mechanism for tvpewritingmachines and its object is to provide improved escapement mechanism andmore especially to provide improvements on the escapemcnt mechanismshown in the patent to Yaw No. 911,303, granted December 28th, 1909.

i To the above and other ends my inventim'i consists in the features ofconstruction. eom binations of devices and arrangements of partsherejnafter described and particularly pointed out in the claims.

\Vhile my invention is designed as an improvement on that of Yawaforesaid, it is to be understood that various features of it may beused in connection with other forms of carriage feeding mechanism.

My invention is illustrated in the accompanying drawings as applied to aNo. Remington typewriting machine.

In said drawings. Figure 1 is a fragmentary vertical front to rearsectional view of' parts-of a typeu'ritingt machine embodying myinvention. Fig. 2 is a rear elevation partly in section of Fig. 1. Figs.3. 4 and 5 are operating views, showing horizontal sections of theesea'pement elements viewed from the rear.

The frame of the typewriting machine co prises a top plate 1 fromwhichrise lugs 2 supporting fixed guide rails of which only the rear one 3 isshown. The rails are grooved to receiv anti-friction 'ba-lls 4'whichalso cooperate with the op iositely grooved rails of a platen cam iage,at lxe rail 5 being illustrated tun 1. The carriage is power. denim bemgconstant-13v drum to which it. isiemreoted was its (not shown) Pivoteelat '6 the flags Ti lfiaom the. rail 5 is a frame lemn ynnfi'ueanwmzdiextend-- ing arms it of wvlulidh omens ihemxi, and secured to saiitll :amnsis u $9911 meek ilmfihich is normality mamtainad spring-pressedengagement fiend Ft fast on wear cam'iage the forward end of a shaft 11which bears in a. bracket '12 secured to the top plate 1. Fixed to therear end of the shaft 11 are. two toothed eseapement wheels 13 and Theseare of the same diameter and are provided with the same number of teeth,numbered respectively 13 and 11, each tooth having a radial working faceand a rear face at an acute angle to said working face. As is wellunderstood the two escapement wheels are relativel; adjustable toprovide either for an ordinary or a reverse. feed that is a feed thattakes its place during the downward stroke of the printing keys.Topl'ovide for such adjustment :1 disk lfi'is secured 'to the rear endof the shaft ll by means of a set screw 15 passingthrough a hub orflange 15 of said disk and abutting against the shaft 11. The escape--ment wheels 13 and 14 are arranged at opposite sides of said disk andare adapted to be clamped thereto by clamping screws 16' which pass fromfront to rear through slots 13 in the forwardeseapement wheel and engagein tapped holes in the rear escape- :nent wheel 1-1 after passingthrough plain holes in the intermediate disk 15. By loosening the screw16 the wheel 13 may be rotated relatively to the'wheel 14, the extent ofrotation being limited by the length of the slots 13". These slots areof sutlieient length to permit an adjustment of the wheel 13 so thata'drop substantially a full letter space distance may, if desired, beobtained between a tooth of the rear wheel 14 and the correspondingtooth in the forward Wheel In the present instance the two eseape mentwheels are adjusted to provide for the reverse feed. the teeth 13 beingset nearly' a full letter space behind the corresponding teeth 14". Theadjustable construction,

above described, for the escapement wheels IS not my invention and isnot claimed per 86 by me; i

A dog rocker or carrier comprising a vertically disposed .arm 17 and aforwardly' extending :arm 18 is fixed on a spindle 1'9 which tn kes[hearings in pivot pins 20 on a i bracket.- V depending from the topplate. The arm El y a ii-inik with universal bar mecha- B QT tfihe dogrocker is connected" nis n coma led thy the printing 'keys, which .a-reeonn dtod to erate .tgpe bars. universathax, type m an printing keys Theare not shown herein, but may be of the usual or any suitableconstruction. Adjustable screw" steps 23 and 24: carried by the dogrocker are adapted to cooperate with angularly disposed faces of a fixedabutment or stop' lug 25, the stops 23, 24 and 25 limiting the movementsof the dog rocker in both directions. A coiled spring 26, con neetcd toa pin 27 on the dog rocker and to a relatively fixed support 28 servesto maintain the pin 23 normally in contact with the reactin stop 25.

The dog rocker provides a support for a dog or member which is novel inconstruction and mounting. Said dog is desi nated' as a whole as 29 andwill be described principally in connection with Fig. 2, which, it willbe recalled, is a rear view. The member 29 isplate-likein form and isslidably and pivotally mounted ina slot or kerf 30 cut in the top of therocker arm 17. The dog or detent 29 is horizontally disposed and has anupwardly extending pointed tooth or dogproper 31 at its right-hand end,said tooth haviiig a straight working face and a beveled rear face andnormally engaging with a tooth 1-1 on the rear escapement wheel. The twoescupement wheels extend down through a slot or opening 1 in the topplate 1 and the do or tooth 31 extends upward partly throng the opening1 to cell eratc with the escapement wheels. Atits le thand end themember or dog 29 is formed with a horizontal slot 32 which receives across pin or pivot 33, bridging the kerf 30. Below the slot the member29 is extended leftward as indicated at 34, the extension 34 beingformed near its end with a vertical hole 35 which receives the upperfree end portion of a vertically disposed arm of an Lshaped wire spring36. From the lower .end of its upright arm the spring 36 has ahorizontally disposed-arm extending rightward and secured at itsright-hand end by a screw 37 to the rocker arm 17. The upright arm ofthe spring 36 is inclined slightly to the right and its tension istoward the right so that it tends constantly to slide the member or dog29 rightward. The spring 36 is, however, normally overcome by the mainspring acting through the engaged tooth 14' and which normal Iright-hand end of the slot 32 in contact with the pin Also the sprin 36tends to hold up the tooth'31and to ho d down the arm 34 which is at theleft of the pivot 33, as viewed from the rear, and to maintain the underside of said arm normally in contact with a buffer or stop 38. Thisbufi'en is preferably a disk of leather or the like which is seated ona. lip or ledge 39 near the top of the rocker arm 17 at the left thereofand is secured in place by a screw 40.

Referring to some of the feature-i of operation, it will be notedlthatin normal position,

the carriage.

y maintains the closed as shown most clearly in Figs. 2 and 3, the dogor detent 31 is engaged at its working or vertical right-hand face withthe working face of one of the teeth 14 and that, viewed from the rear,it is at this time just to the right of and behind one of the teeth 13of 1 the escapement wheel 13, which wheel, it will be recalled, has beenset to provide for a feeding of the carriage of substantially a fullletter space distance during the depression of a printing key. When oneof the printing keys is operated the link 22 acts to rock the dog rockeron its pivot and swings the rocker arm 17 forward, moving the dog ordetent 31 transversel of the plane of the cscapcment wheels, said do Ifpassing out of cngagen'ient with the tooth 4' and into the plane of theteeth of the 'forward escapement wheel 13. As soon as the dog disengagesfrom the engaged tooth 14 it, will be forced right-ward by the spring36, said dog sliding along the top of the buffer 38 and the lefthandside of the bottom of the slot 30, the slot 32 at the same timetraversing the pivot 33. This movement of the dog is independent, ofcourse, of the dog rocker. Said movement is limited by the contact ofthe spring 36 with the upper edge of the buffer 38, as indicated bybroken lines in Fig. 2.

The position of thedog 31st this time is also indicated by broken linesin Fig. 2 and additionally is illustrated in Fig. 4. As soon as the dogdisengages from the escapement wheel 14 the two escapement wheels arefree to turn and permit the advance of If the operated )rinting key isheld down the movement of the escapement wheels and carriage willcontinue for nearly a full letter space distance or until the advancingtooth 13 of the escapement wheel 13 engages with the dog and evercomesthe spring 3G, forcing said dog leftward until theend'of the slot 32contacts with the pivot pin. When the printing key is released and thedog swings back on the dog rocker to normal osition there will be aslight advance of tlic esca ement' wheel and the carriage due to thedrop between the engaged tooth 13 and the next tooth 14 with which thedog engages. Under a very rapid operation, however, it may happen thatthe dog rocker will be swun forward and then swung back, carrying thedog 31 first forward out of the plane of the wheel 14 and then back intothe plane of said wheel before said Wheel has turned any eonsidcrableextent. The cycle 'of operations under such conditions of rapidoperation of the printing keys is represented in Figs. 3 to 5. Comparingthese figures it will be observed thatwhen the dog 31 first swingsforward and out of en' a ment with the tooth 14" it is then slirightward by'the spring 36 past-the tooth 14 (see Fig. 4) after which,moving with the dog rocker,

escapement wheels.

it is swung in behind the previously engaged tooth 14 as'sbown in Pig.5. During this operation it will be noted there has been but a slightturning movement or advance of the escapement wheels, as will beapparent from a comparison of the vertical dotted lines 1-1 in Figs. 3to [1, the line 1--l designating the normal line of contact between thedog 31 and the tooth 14 in l ig. 3 and being supposed to remainstationary in the other two figures so that the extent of the advance ofthe tooth 14 may be readily observed. It will be a 'iparentthat it, asin the prior construction, the dog 31 we! fixed to the dog rocker arm17, instead of as in the puesent instance being slidably mountedthereon, then, in such a rapid operation as described, the dog would notbe moved rightward by its spring 36, as in Fig. 4, so that it couldswing in behind the tooth 14-, as in Fig. 5; but instead would, when therocker returned, strike the back of the tooth 14 and frictionally engagetherewith. The advance of the escapement wheels might be retarded byreason of this friction, and furthermore the dog rocker and dog wouldbe' prevented from swinging back to normal position until the tooth 14had'turned far enough to disengage from the dog. It will be seen thenthat'by the use of my invention an improved operation may result undercertain conditions and the 1 rapid'operaition of the parts andconsequent rapid and uninterrupted advance of the carriage may befacilitated.

It will be observed that the pinion and the escapementwlieels arerigidly connected in the present construction through the shaft 131.Oonseq'nently if the rack 9 remains engaged with the pinion 10 duringreturn movements of the carriage the pinion will be burned backward. aswill also the During the backward turning movement, the rear beveledfaces of the teeth 14, acting against the rear beveled face of the dogor tooth 31. will swing said tooth downward, rocking the memberpivotally on the ivot pin 33. The bottom of the slot is inclineddownward at the right to permit of this pivotal movement. Said pivotalmovement takes place against the tension of the spring 36, the upper endof which, acting against the right-hand side of the hole 35, exerts acamlnmg action on the extension 34, tending to force said extensiondownward and restore the member 29 to normal position. This restoringmovement takes place each time one' of the teeth 14' turns back farenough to release the dog. Consequently, during the backward turningmovement of the vescapenrent wheels the member 29 will be vibratedonits' pivot; as a result of cO-action with each tooth 14". The returnportion of each vibratory movement is limited by the top of the leatherbufl'er 38 which also lessens the noise or click of the vibrations andacts in a degree as a sound deadening device.

It will be observed that the spring 343 has several functions. first. itserves to slide the dog member 25) rightward, as viewed from the rear;second, it serves in conjunction with the buffer 38 to limit the extentof this sliding n1o\"cment; and third, it acts as a restoring springwhen the member 2!) is turned on 33 as a pivot during backward or returnmovements of the carriage. Moreover, the device 38 provides a slightlyyielding support or cushion for the member 2%) and serves also as a stopto limit return pivotal movements of said member and also inconjunctioi-l with the spring 3t; to limit slidablc. movements of saidmember in one direction.

It will further be observed that by my present invention I provide incombination with a power driven carriage, esca wment devices whichcomprise aphn'alily ol'cscapc -ment wheels or circular racks which aresecured together rigidly so that at all times when Ill operation saidwheels move together as one part that means are provided for afi'ordingrelative adjustment between said wheels to regulate the extent of dropor movement when the feed do; moves transversely of said wheels from oneto the other: that the feed (log is mounted on the (log carrier so as tohave a nu'ivenu'nt of translation indelxndcnl of said carrier: that saidfeed dog is movable with the carrier transversely of the planes of theescapemcnt wheclsfthat it is movable in a second direction toward andaway from the axis of said wheels; that it is also movable in a thirddireetion at an angle to the direction of movement toward and away fromthe wheel axis, this movement in the third direction in the presentinstance being a slidable movement of translation on the dog carrier.while the movement at an angle to the slidable movement is a pivotalmovement and may also ake place i1nle )cmlcntl of movement by the (logcarrier; that means are provided cooperating with said dog to restoreit'aftcr such pivotal movement and also after such slidable movement,said means in the present instance being a single spring; that yieldingmeans, in the present instance a leather .bnfi'er, assist to limit themovements of said dog and also that said means tend to promote noiselessoperation of the parts; that the spring coiiperating with said dog tendsnormally to move it in a direction opposite to that in which said wheelst-urn during printing movements of the carriage; that during movement ofthe. dog carrier and dog transverse of the escapement wheels, the springoperates to move the dog in a direction opposite to that in which thewheels turn; that the dog is provided with a hole restoring said dogwhich is engaged by a straight inclined portion of the cooperatingspring; that said spring is in the nature of a. spring cam and acts onsaid dog to cam it and restore it to normal position during backwardturning movements of the escapemcnt wheels.

Various changes may be made without dearting from the scope of myinvention.

What I claim as new and desire to secure by Letters. Patent, is

1. In escapement mechanism for typewriting machines, co-actingescapement devices comprising a feed dog mounted for both pivotalmovement and bodily sliding movement, in combination with a singlespring engaging said dog at one point only and operative on said dog torestore it after such pivotal movement and also after such slidahlemovement.

2. In escapement mechanism for typewriting machines, co-actingescapennrnt devices comprising a feed dog mounted for both pivotalmovement and. bodily sliding movement, in combination with means forrestoring said dog to normal position after such pivotal and slidingmovements, said means engaging said dog at one point only, and yieldingmeans assisting to limit the movements of said dog.

3. In escapement mechanism for typewriting machines, C()2Villllescapement devices comprising a feed dog mounted for -both pivotalmovement and bodily sliding movement, in combination with means for tonormal position after such pivotal and slidingmovements. said meansengaging said dog at one point only, and means assisting to rendernoiseless the movements of said dog.

4. In escapcment mechanism for type writing machines, co-actingeseapement devices comprising a feed dog mounted for both pivotalmovement and bodily sliding movement, and a single spring forcommunicating both pivotal movement and bedily sliding movement to saiddog, said spring engaging said dog at one point only.

5. In escapement mechanism for type writing machines, co-actingescapen'ient devices comprising a feed dog mounted for both pivotalmovement and bodily sliding movex'nent, in combination with butter meansfor said do for said dog, saic spring and said bnll'er means co-actingdirectly with each other to limit the movements of said dog.

6. In escapement mechanism for typewriting machines, co-wctingescapement devices comprising a )ivotal y mounted teed dog, and a springaving a normally inand a restoring spring" clincd portion engaging ahole in said feed dog, said spring acting as a cam for said dog.

7. In escapement mechanism for ty ewriting machines, co-actingescapement evices comprising a pivotally mounted feed dog, and a springcam fpr said dog, said cam operating to turn said dog pivotally andhaving a normally inclined portion en gaging said dog.

8. ln escapement mechanism for ty ewriting machines, co-actin escapcmentevices comprising a pivotal y mounted feed dog, a dog carrier, and a camon said carrier normally under tension to move said dog iridependentlyof said carrier.

9. In a typewriting machine, the combination of two parallel escapementwheels, at key-operated dog carrier movable transversel y of the planesof said wheels, a slotted dog on said dog carrier, a pivot pin engaginga slot in said dog. and a spring engageable at one point only with saiddog, said dog being slidable on said pivot pin and also rotatable on thesame as a center.

1t). Ina typewriting machine, the combination of two parallel escapementwheels, 3. key operated dog carrier 'movable transversely of,thc planesof said wheels, aslotted dog on said do carrier, a pivot pin engaging aslot in said dog, and a spring engage able at one point only with saiddog, said dog being slidable on said pivot pin and also rotatable on thesame as a center, and said spring operating to restore said dog afterboth pivotal and sliding movements thereof.

11. l n a typewriting machine, the combination pi a power drivencarriage, escapemcnt devices comprising a wheel and a dog normallyengaged, the rear faces of said wheel and dog being beveled, said dogbeing movable out of the path of said escapement wheel, and a springengaging at one point only with said dog, said spring assisting tonormally maintain the normal relationship between said dog and saidwheel and permitting the dog to m mo ed out of the path of theescapement wheel during backward movements of said wheel, said springalso operating to move said dog during printing movements of saidescapement wheel.

Signed at llingham. in 'thevcounty of llynionth and State ofMissachusetts this 15th day of August, A. D. 1910.

WALTER J. BARRON.

\Vilnesses:

EIINPZS! E. Lmoonn, Camus V. Wnrrn.

